Pumping stations

Sewer or land drainage pumping stations are common worldwide.  In a sewer system, if gravity flow is unachievable due to the landscape, a sewer pumping station can be used. Sewer pumping stations consist of a wet well and a pump. Sewer normally flows into the wet well by gravity, then when a pre-determined level is reached, the pump turns on a pumps the sewerage to the sewer main. However, should the pump fail and the pumping station becomes overloaded with sewer, an emergency outfall pipe is used to either release the sewerage into a nearby ditch or river, or into the dry well section of the pumping station. The emergency overflow pipe that releases into a river or ditch can be a risk should the level in the river or ditch be such that reverse flow from the river/ditch can occur into the pumping station. Flooding the pumping station with river water can lead to overloading and damaging the pumps. Backflow into the pumping station can also mean that more water than necessary is feed into the sewer main and to the treatment plant causing excessive amounts of water to be treated, increasing costs in the treatment plants.

Wapro products can be used in conjunction with pumping stations in a number of ways.  WaStop will ensure backflow into the pumping station doesn't occur and also improves the surrounding environment by stopping the release of sewer odours into the atmosphere through the overflow pipe.  WaStop can also be used in land drainage pumping stations to ensure backflow into the pumps does not occur. If this occurs damage can be caused to the pumps if they're forced into reverse action and flooding of the lower area can occur. Using a WaStop to prevent backflow in land drainage pumping stations stop backflow completely, whilst with their low headloss WaStop allows a high flow rate through the valves.

WaReg flow regulator can be used to regulate the flow to a land drainage pumping station to ensure it isn't overloaded. By attenuating the peak flows through the use of WaReg the pumping stations capacity can be maximized without causing concern for upstream overloading.

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